Timedeltas and Shifts in Python
From the Pandas cheat sheet · Dates and Time · verified Aug 2026
Timedeltas and Shifts
Calculate durations and compare adjacent rows.
python
df["duration"] = df["ended_at"] - df["started_at"]📌 Sort before shift or diff calculations
💡 Timedelta arithmetic preserves units
🔍 shift aligns prior values by index
🎯 Name derived time units explicitly
timedeltashiftdiff
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